
<template>
    <div>
        <!-- 导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{path:'/home'}">首页</el-breadcrumb-item>
            <el-breadcrumb-item>数据统计</el-breadcrumb-item>
            <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 2.为echarts准备一个具备大小的dom -->
            <div id="main" style="width:750px;height:400px;"></div>
        </el-card>
    </div>
</template>

<script>
// 1.导入echarts
import echarts from 'echarts'
// 进行数据深拷贝
import _ from 'lodash'

export default {
    data(){
        return {
            // 需要合并的数据
             options: {
                title: {
                    text: '用户来源'
                },
                tooltip: {
                    trigger: 'axis',
                    axisPointer: {
                    type: 'cross',
                    label: {
                        backgroundColor: '#E9EEF3'
                    }
                    }
                },
                grid: {
                    left: '3%',
                    right: '4%',
                    bottom: '3%',
                    containLabel: true
                },
                xAxis: [
                    {
                    boundaryGap: false
                    }
                ],
                yAxis: [
                    {
                    type: 'value'
                    }
                ]
            }
        }
    },
    created(){},
    // 此时页面上元素被渲染完毕了
    mounted(){
        // 3.基于准备好的dom,初始化echarts实例
        const myChart = echarts.init(document.getElementById('main'))
        // 发起请求，获取折线图数据
        const {data:res} =  this.$http.get('reports/type/1')
        if(res.meta.status!==200){
            return this.$message.error('获取折线图数据失败')
        }

        // 4.准备数据和配置项
        const result = _.merge(res.data,this.options)

        // 5.展示数据
        myChart.setOption(result)
    },
    methods:{}
}
</script>

<style lang="less" scoped>
</style>

